Yes, Crutchfield's prices are high, but in my opinion they have excellent phone support. This can be worth the premium for the first time DIY'er. That is up to you to decide. I have also bought a lot of equipment (for my SUV) from sonicelectronix.com and have been very satisfied with their prices. Others may have other recommendations.
OP - is your Tundra a double-cab or single-cab?
OP - is your Tundra a double-cab or single-cab?